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Nuvoton Technology - SINGLE CHANNEL VOICECODEC

Numéro de référence W6811
Description SINGLE CHANNEL VOICECODEC
Fabricant Nuvoton Technology 
Logo Nuvoton Technology 





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W6811 fiche technique
W6811 SINGLE CHANNEL
VOICECODEC
1. GENERAL DESCRIPTION
The W6811 is a general-purpose single channel PCM CODEC with pin-selectable u-Law or A-Law companding.
The device is compliant with the ITU G.712 specification. It operates off of separated analog (5V) and digital (3V)
power supplies and is available in 24-pin SOG, and SSOP package options. Functions performed include
digitization and reconstruction of voice signals, and band limiting and smoothing filters required for PCM systems.
The filters are compliant with ITU G.712 specification. W6811 performance is specified over the industrial
temperature range of 40C to +85C.
The W6811 includes an on-chip precision voltage reference and an additional power amplifier, capable of driving
300loads differentially up to a level of 6.3V peak-to-peak. The analog section is fully differential, reducing noise
and improving the power supply rejection ratio. The data transfer protocol supports both long-frame and short-
frame synchronous communications for PCM applications, and IDL and GCI communications for ISDN
applications. W6811 accepts seven master clock rates between 256 kHz and 4.096 MHz, and an on-chip pre-
scaler automatically determines the division ratio for the required internal clock.
2. FEATURES
Power supply:
Analog 4.5 5.5V
Digital 2.7 3.3V
Typical power dissipation of 25 mW, power-
down mode of 0.5 W
Fully-differential analog circuit design
On-chip precision reference of 1.575 V for a 0
dBm TLP at 600
Push-pull power amplifiers with external gain
adjustment with 300 load capability
Seven master clock rates of 256 kHz to 4.096
MHz
Pin-selectable -Law and A-Law companding
(compliant with ITU G.711)
CODEC A/D and D/A filtering compliant with
ITU G.712
Industrial temperature range (40C to +85C)
Package: 24-pin SOG, and SSOP
Pb-Free / RoHS package options available
Applications
Digital Telephone Systems
Central Office Equipment (Gateways, Switches,
Routers)
www.DataSheet.co.kr
PBX Systems (Gateways, Switches)
PABX/SOHO Systems
Local Loop card
SOHO Routers
VoIP Terminals
Enterprise Phones
ISDN Terminals
Analog line cards
Digital Voice Recorders
Revision A15
-1-
January 2011
Datasheet pdf - http://www.DataSheet4U.net/

PagesPages 30
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